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The MIT License (MIT) | ||
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Copyright (c) JS Foundation and other contributors | ||
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Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
this software and associated documentation files (the "Software"), to deal in | ||
the Software without restriction, including without limitation the rights to | ||
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of | ||
the Software, and to permit persons to whom the Software is furnished to do so, | ||
subject to the following conditions: | ||
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The above copyright notice and this permission notice shall be included in all | ||
copies or substantial portions of the Software. | ||
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS | ||
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR | ||
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | ||
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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Copyright (c) JS Foundation and other contributors | ||
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Permission is hereby granted, free of charge, to any person | ||
obtaining a copy of this software and associated documentation | ||
files (the "Software"), to deal in the Software without | ||
restriction, including without limitation the rights to use, | ||
copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
copies of the Software, and to permit persons to whom the | ||
Software is furnished to do so, subject to the following | ||
conditions: | ||
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The above copyright notice and this permission notice shall be | ||
included in all copies or substantial portions of the Software. | ||
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES | ||
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT | ||
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | ||
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | ||
OTHER DEALINGS IN THE SOFTWARE. |
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/* | ||
* Licensed to the Apache Software Foundation (ASF) under one | ||
* or more contributor license agreements. See the NOTICE file | ||
* distributed with this work for additional information | ||
* regarding copyright ownership. The ASF licenses this file | ||
* to you under the Apache License, Version 2.0 (the | ||
* "License"); you may not use this file except in compliance | ||
* with the License. You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
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import { useCallback, useEffect, useState } from 'react'; | ||
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const emptyDOMRect = { height: 0, width: 0, x: 0, y: 0, bottom: 0, left: 0, right: 0, top: 0 }; | ||
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function createEmptyDOMRect(): DOMRect { | ||
// DOMRect is not defined in JSDOM | ||
return typeof DOMRect !== 'undefined' | ||
? new DOMRect() | ||
: { ...emptyDOMRect, toJSON: () => emptyDOMRect }; | ||
} | ||
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export function useResizeObserver(element: HTMLElement | null | undefined) { | ||
const [rect, setRect] = useState(() => createEmptyDOMRect()); | ||
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const maybeUpdate = useCallback( | ||
(e: Element) => { | ||
const newRect: DOMRect = e.getBoundingClientRect(); | ||
if ( | ||
!rect || | ||
rect.bottom !== newRect.bottom || | ||
rect.top !== newRect.top || | ||
rect.left !== newRect.left || | ||
rect.right !== newRect.right || | ||
rect.width !== newRect.width || | ||
rect.height !== newRect.height | ||
) { | ||
setRect(newRect); | ||
} | ||
}, | ||
[rect], | ||
); | ||
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const onScroll = useCallback(() => { | ||
if (element) { | ||
maybeUpdate(element); | ||
} | ||
}, [element, maybeUpdate]); | ||
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useEffect(() => { | ||
const resizeObserver = new ResizeObserver((entries: ResizeObserverEntry[]) => { | ||
if (!Array.isArray(entries) || !entries.length) { | ||
return; | ||
} | ||
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maybeUpdate(entries[0].target); | ||
}); | ||
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if (element) { | ||
resizeObserver.observe(element); | ||
window.addEventListener('scroll', onScroll, true); | ||
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return () => { | ||
resizeObserver.unobserve(element); | ||
window.removeEventListener('scroll', onScroll, true); | ||
}; | ||
} | ||
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return; | ||
}, [element, maybeUpdate, onScroll]); | ||
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return rect; | ||
} |